R410a Full DC Inverter Mini VRF MCAC-VTSM-2013-12
116 Troubleshooting
7.14 P6: IPM Module protection
The following explanation is for 80/105 model.
LED displays P6
IPM module protection
Check whether P-N voltage on the IPM module
is OK. The DC voltage is from
277 to 356V.
NO
Check whether the input power is
correct. The power is
220-240V,
1N, 50Hz.
NO
Adjust to the right
range. Then check
whether the system
runs normally.
YES
Check whether power
wiring is connected
correctly and firmly.
NO
Connect firmly again
and check whether it is
connected right.
NO
YES
Check whether wiring
connection of E part is
connected firmly.
NO
Connect firmly again and
check whether it is connected
correctly.
NO
YES
Check if rectifier bridge is normal
or not.
NO
Replace rectifier.
NO
YES
Check each reactor is
connected normally. If wiring
is damaged, the resistance of
two ports is
∞.
NO
Replace
connecting
wire.
YES
Check if wiring connection
between main PCB and IPM
module is fasten or not.
YES
Check
whether
wiring
connection
of
the
compressor is connected
right and firmly.
YES
Replace IPM module and
check whether the system
can operate normally or not..
NO
Replace main PCB and
check whether the system
can operate normally or not..
YES
Solve the
malfunction.
NO
Replace compressor and
check whether the system
can operate normally or
not.
Connect firmly
again
and
check whether
it is connected
correctly.
NO
Connect
well
again
and
check whether
it is connected
correctly.
。
NO
YES
Solve the problem
NO
NO
YES
Solve the
malfunction.
YES
Check the fuse on the power
board is normal or not.
NO
Replace
the
same model
fuse.
YES
Replace the power
board.
